VPC Reachability Analyzer is a tool that tests and diagnoses network connectivity between resources by analyzing the network path without sending traffic. ANS-C01 covers it for troubleshooting routing and security-group/NACL issues.
Amazon Virtual Private Cloud (VPC) is a logically isolated virtual network in AWS where you define subnets, route tables, and gateways.
AWS Transit Gateway is a regional network hub that interconnects VPCs and on-premises networks through a single gateway with route tables.
AWS Direct Connect is a service that provides a dedicated private network connection between on-premises and AWS.
AWS Site-to-Site VPN is an IPsec VPN connection between on-premises networks and AWS over the internet.
AWS PrivateLink provides private connectivity to AWS and third-party services using interface VPC endpoints, keeping traffic off the public internet.
Amazon Route 53 is AWS's scalable DNS and domain service with public and private hosted zones, routing policies, and health checks.
Amazon Route 53 Resolver is the service that handles recursive DNS for VPCs and enables hybrid DNS through inbound and outbound resolver endpoints.
The Gateway Load Balancer (GWLB) is an Elastic Load Balancing type that transparently inserts third-party virtual appliances, such as firewalls, into the traffic path.
A Network Load Balancer (NLB) is a Layer 4 load balancer that handles high-throughput, low-latency TCP/UDP traffic and can present static IPs.
AWS Network Firewall is a managed, stateful network firewall and intrusion-prevention service for VPCs.
VPC Flow Logs capture metadata about IP traffic to and from network interfaces in a VPC.
VPC Reachability Analyzer is a tool that tests and diagnoses network connectivity between resources by analyzing the network path without sending traffic.
AWS Global Accelerator is a networking service that routes user traffic over the AWS global network to the optimal endpoint using anycast static IPs.
Amazon CloudFront is a content delivery network that caches content at edge locations to reduce latency and offload origins.